Contrast invariance of orientation tuning in the lateral geniculate nucleus of the feline visual system
Sivaram Viswanathan, Jaikishan Jayakumar, Trichur R Vidyasagar
EUROPEAN JOURNAL OF NEUROSCIENCE | WILEY-BLACKWELL | Published : 2015
Responses of most neurons in the primary visual cortex of mammals are markedly selective for stimulus orientation and their orientation tuning does not vary with changes in stimulus contrast. The basis of such contrast invariance of orientation tuning has been shown to be the higher variability in the response for low-contrast stimuli. Neurons in the lateral geniculate nucleus (LGN), which provides the major visual input to the cortex, have also been shown to have higher variability in their response to low-contrast stimuli. Parallel studies have also long established mild degrees of orientation selectivity in LGN and retinal cells. In our study, we show that contrast invariance of orientati..View full abstract
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Awarded by Australian Research Council
This work was supported by an Australian Research Council Discovery Grant (DP120103078) to T.R.V.